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