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