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