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