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