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