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