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