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