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