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