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