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