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