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