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