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