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