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