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