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