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