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)(17,18,23,28)(19,25,29,26)(20,30,21,24)(22,32,31,27)(2,5)(6,7)(10,14)(12,15)(13,16)(17,19,22,21,23,29,31,20)(18,24,27,25,28,30,32,26)(9,10,11,13)(12,16,15,14)(17,20,31,29,23,21,22,19)(18,25,32,24,28,26,27,30)(1,3,4,8)(2,6,5,7)(10,13)(14,16)(17,21,22,29,23,20,31,19)(18,26,27,24,28,25,32,30)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.