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)(14,16)(17,18,21,24,22,25,20,30)(19,23,28,31,29,32,27,26)(2,5)(6,8)(10,14)(12,15)(13,16)(17,19,21,28,22,29,20,27)(18,23,24,31,25,32,30,26)(1,3,4,7)(2,6,5,8)(9,10)(11,13)(12,16)(14,15)(17,18)(19,26)(20,24)(21,30)(22,25)(23,27)(28,32)(29,31)(2,5)(6,8)(17,20,22,21)(18,24,25,30)(19,27,29,28)(23,31,32,26)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.