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