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