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