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