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