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