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