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