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