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