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