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