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