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