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