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