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