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