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