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