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