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