Group Column Bars In Graph With Specific Sorting?

I'm trying to figure out a way to group columns in a bar graph without displaying them in a cluster, but instead in displaying them individually in a specific order. However, I still want to identify each group with a different color. This is hard to describe, so I'll try my best to illustrate what I'm trying to do with an example. Assume I have three groups of data and within each group I have 2 to 3 items in it with different values. In a list the data would look like this:

Group 1 - Item 1 - $2,000
Group 2 - Item 2 - $1,100
Group 1 - Item 3 - $2,200
Group 1 - Item 4 - $3,200
Group 3 - Item 5 - $1,800
Group 2 - Item 6 - $1,200
Group 1 - Item 7 - $2,500
Group 3 - Item 8 - $2,800

What I want to do is create a bar graph that will still allow me to color all group 1 items as red, all group 2 items as blue, and all group 3 items as green while still showing each bar sorted in the order I've shown above and labeled as items 1 through 8. Then, I want a legend to only show the groups 1 - 3 with their colors. To explain, the graph would look like this:

Bar 1 would be labeled as Item 1, with a value of $2,000, and colored red
Bar 2 would be labeled as Item 2, with a value of $1,100, and colored blue
Bar 3 would be labeled as Item 3, with a value of $2,200, and colored red
Bar 4 would be labeled as Item 4, with a value of $3,200, and colored red
Bar 5 would be labeled as Item 5, with a value of $1,800, and colored green
Bar 6 would be labeled as Item 6, with a value of $1,200, and colored blue
Bar 7 would be labeled as Item 7, with a value of $2,500, and colored red
Bar 8 would be labeled as Item 8, with a value of $2,800, and colored green

Then, the legend would only show the groupings of Group 1, 2, 3, 4 and their associated colors.

(By the way... I know I can do this manually by selecting each bar and customizing the color, but I want an automated way of doing this to reduce maintenance time)