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