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