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