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