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