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