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