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