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