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