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