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