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