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