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