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