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