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