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)(20,27,30,32)(25,31,28,29)(2,5)(6,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,27)(21,22)(23,26)(25,31)(28,29)(30,32) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,20,23,30)(18,25,21,28)(19,27,26,32)(22,29,24,31)(1,3,4,7)(2,6,5,8)(11,16)(13,15)(17,21,23,18)(19,22,26,24)(20,28,30,25)(27,29,32,31)(10,14)(13,15)(17,22,23,24)(18,26,21,19)(20,29,30,31)(25,32,28,27)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.