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