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