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