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