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