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