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