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