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