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