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