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