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