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