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