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