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)(11,15)(12,14)(13,16)(17,18)(19,26)(20,24)(21,31)(22,32)(23,25)(27,30)(28,29) involution — undirected(1,3,5,4)(2,6,7,8)(17,19,23,20)(18,24,25,26)(21,29,32,27)(22,28,31,30)(2,7)(6,8)(9,10,12,14)(11,13,16,15)(18,25)(19,20)(21,32)(28,30)(1,2)(3,6)(4,8)(5,7)(9,10)(11,13)(12,14)(15,16)(17,20,23,19)(18,24,25,26)(21,29,32,27)(22,30,31,28)(1,4,5,3)(2,8,7,6)(9,11,12,16)(10,13,14,15)(17,21)(18,22)(19,27)(20,29)(23,32)(24,30)(25,31)(26,28)(17,22)(18,21)(19,28)(20,30)(23,31)(24,29)(25,32)(26,27) 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.