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