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