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