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