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