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