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