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)(22,26)(23,30)(24,33)(27,35)(31,32)(34,36)(5,7,10,17)(6,11,14,15)(8,16,9,18)(12,19,13,20)(21,22,25,26)(23,27,32,34)(24,29,33,28)(30,36,31,35)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(21,23,24,30,25,32,33,31)(22,27,29,36,26,34,28,35)(5,9,10,8)(6,13,14,12)(7,16,17,18)(11,19,15,20)(22,26)(27,34)(28,29)(35,36)(1,3,4,2)(6,14)(11,15)(12,13)(19,20)(21,24,25,33)(22,28,26,29)(23,31,32,30)(27,36,34,35)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.