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