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