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