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