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