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