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