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