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