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