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