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