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