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