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