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