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)(19,22)(20,23)(21,25)(24,28)(26,30)(27,29)(31,32)(1,3,4,12,6,11,5,13)(2,7,8,10,9,15,14,16)(17,19)(18,22)(20,27)(21,26)(23,29)(24,31)(25,30)(28,32)(3,11)(7,15)(10,16)(12,13)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31) involution — undirected(19,26)(22,30)(27,32)(29,31) involution — undirectedA 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.