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