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