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