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