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