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