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