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