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