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