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