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