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