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