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