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)(8,22,24,30,25,27,23,14)(18,32,34,36,35,28,33,31)(1,2,3,4)(6,12,16,15)(13,26,29,17)(14,27,30,22)(28,36,32,31)(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(5,8,9,23,11,25,10,24)(6,14,15,22,16,30,12,27)(7,18,19,33,21,35,20,34)(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.