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