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