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