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