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