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