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