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