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