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