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