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