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