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