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