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