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