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