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