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