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