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