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