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)(8,21,22,13,24,29,23,30)(19,33,32,36,35,27,34,31)(1,2)(3,4)(7,18,20,25)(12,26,28,17)(19,34,35,32)(27,31,33,36)(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)(23,32)(24,35)(29,36)(30,33) involution — undirected(5,8,9,22,11,24,10,23)(6,13,14,29,16,30,15,21)(7,19,25,34,20,35,18,32)(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.