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