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)(11,13)(12,15)(14,16)(17,18)(19,23)(20,21)(22,24)(25,26)(27,28)(29,32)(30,31) involution — undirected(2,5)(6,7)(10,11)(12,16)(17,19,22,20)(18,21,24,23)(25,27,31,32)(26,29,30,28)(9,10,13,11)(12,14,16,15)(17,19,22,20)(18,23,24,21)(25,28,31,29)(26,32,30,27)(1,3,4,8)(2,6,5,7)(9,11,13,10)(12,14,16,15)(17,20,22,19)(18,23,24,21)(25,29,31,28)(26,32,30,27)(1,2)(3,7)(4,5)(6,8)(9,12,13,16)(10,14,11,15)(17,21,22,23)(18,20,24,19)(25,30,31,26)(27,29,32,28)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.