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