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