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