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