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