Combination Generator - Sort By Color - Not By Sizes!

[Kaper]

Hello,

 

Please Can you help me with this problem?

 

If i create combinations with comb. generator manager, it is sorting combinations by sizes, i would like to sort it by color.

 

Model example: 
Shirt with 2 colors + 2 sizes = 4 combinations

 

Now it is generating like this one:
Color: Black | Size: S
Color: White | Size: S
Color: Black | Size: M
Color: White | Size: M
(Sorting by sizes... ) 

I want it like this:
Color: Black | Size: S
Color: Black | Size: M
Color: Black | Size: ...

Color: White | Size: S
Color: White | Size: M
Color: White | Size: ...
(Sort by color, and then sizes)

 

Thank you very much for your help