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