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