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