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)(11,14)(12,13)(15,16)(17,18,21,24)(19,20,27,23)(22,25,29,32)(26,28,30,31)(1,3,5,4)(2,6,7,8)(19,26)(20,28)(22,29)(23,31)(25,32)(27,30)(10,13)(14,16)(17,19,21,27)(18,23,24,20)(22,30,29,26)(25,28,32,31)(9,11,12,15)(10,14,13,16)(19,26)(20,28)(22,29)(23,31)(25,32)(27,30)(1,4,5,3)(2,6,7,8)(17,20,21,23)(18,19,24,27)(22,31,29,28)(25,30,32,26)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.