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