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