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