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