One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(10,12)(11,15) involution — undirected(2,5)(6,8)(9,10,13,12)(11,16,15,14)(17,18)(19,23)(20,24)(21,22)(25,31)(26,29)(27,32)(28,30)(1,2,4,5)(3,6,7,8)(9,11,13,15)(10,14,12,16)(18,22)(23,29)(24,30)(31,32)(1,3)(2,6)(4,7)(5,8)(9,12,13,10)(11,16,15,14)(17,18)(19,23)(20,24)(21,22)(25,31)(26,29)(27,32)(28,30)(17,19,21,26)(18,23,22,29)(20,27,28,25)(24,32,30,31)(17,20,21,28)(18,24,22,30)(19,25,26,27)(23,31,29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.