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