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