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