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)(19,24)(20,25)(21,23)(22,26)(27,30)(28,31)(29,32) involution — undirected(9,11,13,12)(10,14,15,16)(18,23)(20,21)(24,30)(25,26)(27,29)(31,32)(2,6)(5,7)(17,19)(18,24)(20,29)(21,27)(22,28)(23,30)(25,32)(26,31) involution — undirected(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,20)(19,27)(21,22)(23,25)(24,31)(28,29)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.