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