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