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