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