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