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