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