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