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