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