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