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