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