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