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