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