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