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