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