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