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