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