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