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)(13,14,18,16)(15,19,17,20)(21,22)(23,28)(24,29)(25,30)(26,27)(31,32)(33,35)(34,36)(5,6,8,9)(7,11,12,10)(13,15,18,17)(14,19,16,20)(22,27)(25,29)(28,35)(32,36)(6,9)(10,11)(13,16,18,14)(15,19,17,20)(21,23)(22,28)(24,34)(25,32)(26,33)(27,35)(29,36)(30,31)(1,2)(3,4)(5,6)(7,10)(8,9)(11,12)(13,17,18,15)(14,19,16,20)(21,24,26,30)(22,29,27,25)(23,31,33,34)(28,32,35,36)(5,7)(6,10)(8,12)(9,11)(21,25,26,29)(22,30,27,24)(23,32,33,36)(28,31,35,34)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.