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)(17,18,22,23)(19,24,27,31)(20,28,29,25)(21,26,30,32)(1,2)(3,6)(4,5)(7,8)(10,13)(11,15)(17,19)(18,24)(20,26)(21,25)(22,27)(23,31)(28,30)(29,32) involution — undirected(10,13)(14,16)(17,20,22,29)(18,25,23,28)(19,21,27,30)(24,32,31,26)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,18,22,23)(19,24,27,31)(20,28,29,25)(21,26,30,32)(2,5)(6,8)(9,11,12,15)(10,14,13,16)(17,21)(18,26)(19,20)(22,30)(23,32)(24,28)(25,31)(27,29)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.