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