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