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