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