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