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