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