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)(13,14,16,18)(15,19,20,17)(21,22,26,27)(23,30,33,28)(24,34,29,25)(31,35,36,32)(6,7)(10,11)(13,14,16,18)(15,17,20,19)(22,27)(24,29)(28,30)(31,36)(5,6,9,7)(8,11,12,10)(13,15)(14,17)(16,20)(18,19)(21,23,26,33)(22,28,27,30)(24,31,29,36)(25,35,34,32)(1,2,3,4)(5,7,9,6)(8,11,12,10)(13,14)(15,17)(16,18)(19,20)(21,24,26,29)(22,25,27,34)(23,31,33,36)(28,35,30,32)(5,8,9,12)(6,10,7,11)(21,25)(22,29)(23,32)(24,27)(26,34)(28,31)(30,36)(33,35)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.