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