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