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