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