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