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