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