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