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