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