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