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