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