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