A friend of mine (yes, I do have one or two) sent me a link to another mythology teacher's web page. I encourage you to go to it at: http://web.cn.edu/kwheeler/resource_lit.classics.html. On it, I found a pretty good .pdf file that has a titan family tree. Here is a screen shot:
This view is a little hard to see, but you can see that it has a nice look to it. Could definitely be used in a class or just to reference who is who.
The actual file can be found directly at: http://web.cn.edu/kwheeler/documents/Gods_n_TitansGrk.pdf