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