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