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)(11,14)(12,15)(13,16)(18,22)(19,23)(24,28)(25,30)(26,27)(31,32) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,11,14,10)(12,15,13,16)(17,18,21,22)(19,23,27,26)(20,28,29,24)(25,31,32,30)(3,7)(5,8)(9,12,14,13)(10,15,11,16)(17,19)(18,23)(20,25)(21,27)(22,26)(24,30)(28,31)(29,32)(2,6)(3,7)(9,13,14,12)(10,15,11,16)(17,20,21,29)(18,24,22,28)(19,25,27,32)(23,30,26,31)(3,7)(5,8)(10,11)(15,16)(17,18,21,22)(19,26,27,23)(20,28,29,24)(25,30,32,31)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.