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