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