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