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