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