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