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