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