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