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