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