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