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