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