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