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