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