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