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