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