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