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