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