Welcome to the forum, Trag.
I agree with Darrell's suggestion to seek out anything written by Dr. Norton.
Otherwise, what you have to understand is that domestic 'Platies & Swordtails' can be a combination of any number of Xiphophorus species. While we can make some pretty educated guesses about various traits, there is always a chance that you'll be dealing with different genes than someone else is dealing with, even if the fish are supposed to be the same. What genes are involved, inherited, and how they play with each other, can vary widely.
This is especially true now that more wild-type Xiphophorus are in the hobby. I can use the research that Dr. Norton did so brilliantly as a guide, but I'd have to map my own colony. Her domestic red Swordtails may be X. helleri x X. maculatus, whereas mine could be X. helleri x X. maculatus with X. montezumae as a paternal great grandpa, type thing. Furthermore, chances are I don't know what genes my domestic hybrid is carrying, I just know I have a pretty red Swordtail.
Basically, there is no standard chart because there is no standard hybrid to base it on. But you will learn a lot from Dr. Norton that still applies, and that much more from other ALA members should you choose to join. The 'Livebearers' journal that comes with membership often has articles with details that you won't find elsewhere. We'd love to have you join us.