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