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