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