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