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