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