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)(17,18,24,21)(19,29,32,20)(22,27,23,28)(25,31,30,26)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19,23,26,24,32,22,31)(18,25,27,29,21,30,28,20)(1,3,4,7)(2,6,5,8)(10,14)(11,15)(17,20,22,30,24,29,23,25)(18,26,28,19,21,31,27,32)(9,11)(10,13)(12,15)(14,16)(17,21,24,18)(19,30,32,25)(20,31,29,26)(22,27,23,28)(11,15)(13,16)(17,22,24,23)(18,27,21,28)(19,26,32,31)(20,30,29,25)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.