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