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