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