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