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