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