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