One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(6,8)(17,18)(19,25)(20,29)(21,31)(22,23)(24,28)(26,32)(27,30) involution — undirected(9,10,13,12)(11,15,16,14)(18,23)(21,29)(24,25)(27,32)(1,2,4,3)(9,11,13,16)(10,14,12,15)(17,19,22,28)(18,24,23,25)(20,30,31,26)(21,27,29,32)(1,2,4,3)(5,6)(7,8)(17,20)(18,21)(19,26)(22,31)(23,29)(24,32)(25,27)(28,30)(1,3,4,2)(9,12,13,10)(11,15,16,14)(17,21)(18,20)(19,27)(22,29)(23,31)(24,30)(25,26)(28,32)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.