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)(21,22,24,28)(23,31,33,32)(25,30,26,29)(27,35,36,34)(5,7,11,9)(6,12,14,20)(8,16,10,17)(13,18,19,15)(21,22)(23,32)(24,28)(25,30)(26,29)(27,35)(31,33)(34,36)(2,4)(5,8,11,10)(6,13,14,19)(7,16,9,17)(12,18,20,15)(21,23,24,33)(22,27,28,36)(25,35,26,34)(29,32,30,31)(5,9,11,7)(6,12,14,20)(8,17,10,16)(13,18,19,15)(22,28)(27,36)(29,30)(31,32)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.