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