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