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