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