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)(19,23)(20,25)(21,24)(22,26)(27,31)(28,30)(29,32) involution — undirected(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(17,19)(18,23)(20,21)(22,27)(24,25)(26,31)(28,29)(30,32)(1,3,5,4)(2,7,8,6)(10,14)(13,16)(18,24)(19,27)(20,28)(22,29)(23,30)(25,31)(1,4,5,3)(2,6,8,7)(17,20,21,19)(18,25,24,23)(22,28,29,27)(26,30,32,31)(19,27)(20,28)(22,29)(23,31)(25,30)(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.