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