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