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)(13,14,17,16)(15,19,20,18)(21,22,25,28)(23,26,31,35)(24,27,29,33)(30,34,32,36)(13,15,17,20)(14,18,16,19)(21,23,29,30,25,31,24,32)(22,26,33,34,28,35,27,36)(5,7,8,12)(6,9,10,11)(14,16)(18,19)(23,30)(24,29)(26,34)(27,33)(31,32)(35,36)(2,4)(13,16,17,14)(15,19,20,18)(23,31)(26,35)(30,32)(34,36)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.