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