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