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