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