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