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