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