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