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