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