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