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