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