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