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