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