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