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