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