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