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