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