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