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