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