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