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