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