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