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