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