One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4) involution — undirected(5,6,9,12,10,13,8,17)(7,14,15,19,16,11,18,20)(21,22)(23,29)(24,32)(25,27)(26,30)(28,34)(31,36)(33,35)(5,7,10,16)(6,11,13,14)(8,15,9,18)(12,19,17,20)(21,23,25,31)(22,26,27,35)(24,33,34,30)(28,36,32,29)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(22,27)(26,35)(28,32)(29,36)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.