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