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