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