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)(17,18,22,26)(19,23,28,31)(20,24,21,25)(27,30,29,32)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(19,27)(20,21)(23,30)(24,25)(28,29)(31,32)(1,3,5,4)(2,7,8,6)(10,15)(11,16)(1,3,5,4)(2,7,8,6)(9,12,13,14)(10,16,15,11)(17,19)(18,23)(20,27)(21,29)(22,28)(24,30)(25,32)(26,31)(1,4,5,3)(2,7,8,6)(17,20,22,21)(18,24,26,25)(19,27,28,29)(23,30,31,32)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.