I searched several sites and typed in different requests, but didn't come up with a blank graph of any kind for that block.
You may have to simply use regular graph paper and color in your blanks there to see if your color scheme will work for you. I've often done this when working with a pattern and not knowing what exactly I want to do with it. Decide how many fabrics/colors you want to work with and color in some squares or even just color in 1" strips in as many colors as you want to use to see how they look against each other. Then go to your stash/store with that info and start pulling fabrics to audition in those positions.
I sure wish I could have been more help kasapa. I'd love to see what you wind up doing with this pattern. :)