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