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