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