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)(13,14,16,18)(15,19,20,17)(21,22)(23,30)(24,25)(26,28)(27,29)(31,34)(32,33)(35,36)(5,7)(6,8)(9,11)(10,12)(13,14)(15,17)(16,18)(19,20)(21,23,27,24)(22,25,29,30)(26,31,35,32)(28,33,36,34)(6,9)(7,12)(13,14)(15,19)(16,18)(17,20)(21,24,27,23)(22,25,29,30)(26,31,35,32)(28,34,36,33)(1,2,3,4)(5,8)(6,7)(9,12)(10,11)(13,14)(15,19)(16,18)(17,20)(21,25)(22,23)(24,29)(26,34)(27,30)(28,32)(31,36)(33,35)(5,9,10,6)(7,11,12,8)(13,15)(14,17)(16,20)(18,19)(21,26,27,35)(22,28,29,36)(23,31,24,32)(25,33,30,34)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.