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