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