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