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