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