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