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