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