I line my strips up and sew them together. Each strip is offset by a couple inches. When it is done and pressed, I take a ruler and start cutting strips at 45 degrees. These will look like parellograms. Re-align the like colors until you have big diamonds and sew.
That process was not explained so well, but try it on paper if you want to see what I mean.
Let me look through my UFOs - I may have some to show you.