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