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