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