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