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