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