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