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