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