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