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