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