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