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