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