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