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