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