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