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