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