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