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