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