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