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