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