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