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