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