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