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