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