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