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