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