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