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