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