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