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