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