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