One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,13,14)(11,15,12,16)(17,18,22,26)(19,23,21,25)(20,28,29,31)(24,30,32,27)(2,5)(3,7)(10,14)(11,12)(17,19,22,21)(18,23,26,25)(20,27,29,30)(24,31,32,28)(9,10)(11,16)(12,15)(13,14)(17,20,22,29)(18,24,26,32)(19,27,21,30)(23,31,25,28)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,15,14,16)(9,12,13,11)(10,15,14,16)(17,19,22,21)(18,25,26,23)(20,27,29,30)(24,28,32,31)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.