I don't know if such a list exists for all orchids or not, but a very easy and good place to start is wikipedia, here is a link to one such page about Cattleya alliance and the hybrids, scroll to the bottom to find a list of genera that can form hybrids with your genus and also short forms of the hybrid names, like what Yamadara stands for, or what parents do Potinara have etc etc.
Cattleya - Wikipedia, the free encyclopedia