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