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