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