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