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