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