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