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