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)(14,18)(15,20)(21,22,26,25)(23,29,31,27)(24,32,33,28)(30,34,36,35)(6,8)(10,11)(13,14,17,18)(15,16,20,19)(24,33)(28,32)(30,36)(34,35)(5,7)(6,10)(8,11)(9,12)(13,15)(14,19)(16,18)(17,20)(21,23,26,31)(22,27,25,29)(24,30,33,36)(28,34,32,35)(1,2)(3,4)(5,8,9,6)(7,11,12,10)(13,16,17,19)(14,15,18,20)(21,24)(22,28)(23,30)(25,32)(26,33)(27,34)(29,35)(31,36)(5,7)(6,11)(8,10)(9,12)(13,15)(14,16)(17,20)(18,19)(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.