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