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