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