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