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