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