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