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