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)(13,14,17,15)(16,19,20,18)(21,22,26,27)(23,25,31,28)(24,32,34,29)(30,33,36,35)(8,12)(10,11)(13,14,17,15)(16,19,20,18)(22,27)(25,28)(29,32)(33,35)(6,7)(10,11)(14,15)(18,19)(21,23)(22,28)(24,30)(25,27)(26,31)(29,33)(32,35)(34,36) involution — undirected(1,2)(3,4)(5,7,9,6)(8,11,12,10)(13,15,17,14)(16,19,20,18)(21,24,26,34)(22,29,27,32)(23,30,31,36)(25,35,28,33)(5,8)(6,10)(7,11)(9,12)(13,16)(14,18)(15,19)(17,20)(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.