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