There are no real feat chains anymore except the armor feats and the multiclassing feats. I don't think anyone needs an entire tree to keep track of those.
I really don't see the point of making a graphic tree here, unless you're gonna group it by class, race, etc. which is just as pointless, since you'd have a ton of categories with a couple of feats at best. =/ The feats are far too varied and independent to have any kind of meaningful 'tree' structure. If you have some clever idea about making one, I'd love to hear it though.