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