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