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