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