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