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)(13,17)(14,16)(15,18)(19,20)(21,22,27,31,26,23,25,29)(24,32,34,28,35,36,33,30)(2,4)(5,7)(6,10)(8,14)(9,13)(11,17)(12,16)(15,19)(18,20)(21,23,26,22)(24,28,35,30)(25,29,27,31)(32,33,36,34)(6,11)(7,13)(8,15)(16,20)(21,24)(22,28)(23,30)(25,34)(26,35)(27,33)(29,36)(31,32) involution — undirected(5,8,9,15)(6,12,11,18)(7,14,13,19)(10,16,17,20)(21,25,26,27)(22,29,23,31)(24,33,35,34)(28,32,30,36)(7,13)(10,17)(14,19)(16,20)(21,25,26,27)(22,29,23,31)(24,34,35,33)(28,36,30,32)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.