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