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