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