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