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