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