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