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