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