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