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