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