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