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