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