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