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