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