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