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