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