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