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