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