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