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