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