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