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