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