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