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