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