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