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