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