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