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