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