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)(13,14,17,19)(15,20,16,18)(21,22,25,26)(23,27,31,29)(24,32,33,28)(30,35,36,34)(5,6,9,7)(8,10,12,11)(13,15,17,16)(14,18,19,20)(22,26)(27,29)(28,32)(34,35)(6,7)(10,11)(14,19)(18,20)(21,23,25,31)(22,27,26,29)(24,30,33,36)(28,34,32,35)(1,2)(3,4)(5,7,9,6)(8,10,12,11)(13,14)(15,18)(16,20)(17,19)(21,22)(23,29)(24,32)(25,26)(27,31)(28,33)(30,34)(35,36)(5,8,9,12)(6,10,7,11)(13,16,17,15)(14,18,19,20)(21,24,25,33)(22,28,26,32)(23,30,31,36)(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.