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