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