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