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