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