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