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