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)(17,18,22,24)(19,21,27,26)(20,23,30,31)(25,29,32,28)(9,11)(10,13)(12,16)(14,15)(17,19,22,27)(18,21,24,26)(20,28,30,29)(23,25,31,32)(2,6)(7,8)(11,16)(13,15)(17,20,18,23,22,30,24,31)(19,25,26,28,27,32,21,29)(1,3,5,4)(2,7,6,8)(10,14)(13,15)(17,18,22,24)(19,21,27,26)(20,23,30,31)(25,29,32,28)(1,4,5,3)(2,8,6,7)(17,21,18,19,22,26,24,27)(20,29,23,25,30,28,31,32)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.