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