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