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