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