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