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