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