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