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