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