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