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