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