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)(21,22,25,29)(23,26,31,28)(24,32,34,35)(27,33,36,30)(5,7,10,17)(6,11,14,15)(8,16,9,18)(12,19,13,20)(21,23,25,31)(22,26,29,28)(24,33,34,30)(27,32,36,35)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(21,24,31,33,25,34,23,30)(22,27,26,35,29,36,28,32)(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)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.