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