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