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