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