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