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