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