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