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