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