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