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