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