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