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