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