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)(11,14,12,16)(17,18)(19,26)(20,24)(21,23)(22,25)(27,31)(28,32)(29,30)(9,10)(11,16)(12,14)(13,15)(18,23)(19,27)(20,28)(22,29)(24,31)(26,32) involution — undirected(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19)(18,24)(20,21)(22,28)(23,26)(25,31)(27,29)(30,32)(9,12,13,11)(10,14,15,16)(18,23)(19,20)(25,30)(27,28)(1,3,4,7)(2,6,5,8)(17,20)(18,24)(19,21)(22,27)(23,26)(25,31)(28,29)(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.