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