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