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