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