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