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)(21,22,24,29,25,28,32,27)(23,26,31,33,30,34,36,35)(2,4)(5,7,9,18,8,17,10,19)(6,11,13,16,12,15,14,20)(21,23,24,31,25,30,32,36)(22,26,29,33,28,34,27,35)(5,6,8,12)(7,16,17,20)(9,14,10,13)(11,19,15,18)(22,27)(23,30)(24,32)(26,33)(28,29)(34,35)(2,4)(7,17)(11,15)(16,20)(18,19)(22,28)(23,30)(27,29)(31,36) 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.