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