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