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