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