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