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