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