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