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