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