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