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