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