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