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