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