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