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