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