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