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