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