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