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