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