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