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