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