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