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