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