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