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