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