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