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